Method of treating pneumatic tire

ABSTRACT

A method of treating a pneumatic tire, which comprises introducing a repair agent for a punctured tire comprising a latex into the inside of a punctured tire with a rim, followed by sealing, and then introducing a polymer coagulating agent into the inside of the punctured tire to coagulate the repair agent.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention concerns a method of treating a pneumatictire, and more particularly a method of treating a pneumatic tire formaking the tire disposable by taking out the pneumatic tire withoutoozing a repair agent for a punctured tire from a punctured pneumatictire with a rim wherein the repair agent for punctured tire isintroduced into the inside of the punctured tire.

[0003] 2. Background Art

[0004] As a temporary repair method in case of puncture of a pneumatictire, there is a method for injecting a liquid repair agent forpunctured tire into the pneumatic tire, and obstructing the puncturehole from the tire inside. The repair agent for punctured tire used forthis method is composed of a latex of O/W dispersion emulsion typewherein natural rubber or the like is dispersed in water, and alkalizedwith ammonium. This repair agent for punctured tire is injecting in thetire on the order of 500 ml, for obstructing a puncture hole made bysticking a nail or the like with latex.

[0005] The repair by this liquid repair agent for punctured tire beingtemporary, a regular puncture repair shall be performed in a repair shopsuch as gas station or the like after this temporary repair, or the tirebe discarded. However, the repair agent for punctured tire included inthe inside of the tire being liquid, there was a problem that the repairagent for punctured tire soils the surroundings by dripping down orotherwise, when the tire with a rim is removed from the wheel for suchpuncture repair or discard.

SUMMARY OF THE INVENTION

[0006] The present invention has an object to provide a method oftreating a pneumatic tire composed not to soil the surroundings, whenthe puncture treated pneumatic tire with a rim is removed from thewheel, by introducing a repair agent for a punctured tire comprising alatex into the inside of a punctured tire, followed by sealing.

[0007] The method of treating a pneumatic tire of the present inventionto achieve the aforementioned object is characterized in that itcomprises introducing the repair agent for punctured tire comprising alatex into the inside of a punctured tire with a rim, followed bysealing, and then introducing a polymer coagulating agent into theinside of the punctured tire to coagulate the repair agent.

[0008] Thus, as the polymer coagulating agent being introduced into theinside of a puncture repaired pneumatic tire wherein the repair agentfor punctured tire comprising the latex is sealed to coagulate therepair agent for punctured tire, the repair agent for punctured tirewould not drips down when the pneumatic tire is removed from the wheel,allowing not to soil the surroundings.

BRIEF DESCRIPTION OF THE DRAWINGS

[0009]FIG. 1 is a schematic illustrative drawing showing a method oftreating a pneumatic tire according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0010] Now, a composition of the present invention shall be described indetail referring to an attached drawing.

[0011] In FIG. 1, the numeral 1 indicates a punctured pneumatic tire,which is integrated into a rim 2. This pneumatic tire 1 is, as atemporary measure for the puncture, injected into the inside thereofwith a liquid repair agent 3 for punctured tire comprising a latexthrough a valve 6.

[0012] Conventionally, the puncture repaired pneumatic tire 1 asmentioned above, was removed from the rim 2 (wheel) at the repair shopto, for instance, discard in a state where the repair agent 3 forpunctured tire in the interior had been eliminated beforehand.

[0013] In the present invention, the aforementioned puncture repairedpneumatic tire 1 is left integrated into the rim, and a polymercoagulating agent 5 is dropped and injected through a valve 6 into theinterior (insie) of the pneumatic tire from a syringe 4 filled with thepolymer coagulating agent. This dripping coagulates the repair agent 3for punctured tire and the coagulate coagulated in gel deposits on thetire inner wall face and so on.

[0014] Thus, the repair agent for a punctured tire becomes a gelledcoagulum and deposits for instance on the tire inner wall face, therepair agent for punctured tire will not ooze and soil the surroundings,when the pneumatic tire 1 is removed from the rim 2.

[0015] The repair agent for punctured tire may include an organicsolvent such as freeze proofing agents including ethylene glycol,propylene glycol or the like; however, such organic solvent can also beprevented from soiling, as it will be included in the gel when itcoagulates taking a gel structure.

[0016] In the present invention, those repair agents for punctured tiremade of a latex comprising a natural rubber or a synthetic rubberdispersed in the water, and alkalized by ammonia are used preferably.This repair agent for punctured tire is injected in the inside of thetire by the order of 500 ml through an air valve, during the puncturerepair of a pneumatic tire with a rim. As for rubber of the latex to beused, butyl rubber, styrene-butadiene rubber and so on are used amongsynthetic rubbers.

[0017] The polymer coagulating agent is not particularly limited,provided that it can coagulate the repair agent for punctured tireincluding liquid components (for instance, mixture components such asethylene glycol, propylene glycol and so on). For instance, it is atleast one kind of polymer or copolymer selected from acrylamide,methacrylamide, acrylic acid, acrylic ester and methacrylate ester andothers. More particularly, it is, for instance, an imine type polymercoagulating agent comprising polyethylene imine, an amine type polymercoagulating agent, an acrylamide type polymer coagulating agentcomprising acrylamide, a methacrylamide type polymer coagulating agentpolymethacryl amide, an acryacryl ester type polymer coagulating agentcomprising polyacryl ester, a methacrylate ester type polymercoagulating agent comprising polymethacryl ester or the like. Also, themixture of a plurality of polymer coagulating agents selected from thesepolymer coagulating agents may be used. One which is especiallypreferable among them is the imine type polymer coagulating agentcomprising polyethylene imine.

[0018] The polymer coagulating agent is injected in the inside of thetire through for instance an air valve of a tire, in the form of aqueousdispersion. As injector of the injection thereof, those of droppingpipette type or syringe type can be used, and they can be sizedaccording to the addition amount of the polymer coagulating agent.

[0019] The polymer coagulating agent is preferably injected in theinside of the tire as aqueous dispersion of 20 to 30 weight %. In caseof aqueous dispersion less than 20 weight %, the quantity of polymercoagulating agent to be added is too little, making the coagulationdifficult, or the produced gel becomes too soft that it hardly depositson the tire inner wall surface. On the other hand, in case of that morethan 30 weight %, the concentration is too high that the viscositybecomes to high, making difficult to inject from the valve 6 andfurther, in some cases, making difficult to blend with the repair agentfor punctured tire.

[0020] As for the injection quantity of the polymer coagulating agentinto the inside of the tire, it is preferably to make the proportion ofaqueous dispersion of the aforementioned polymer coagulating agent 0.5to 3 weight % to the repair agent for punctured tire. In case of aqueousdispersion less than 0.5 weight %, the quantity of polymer coagulatingagent to be added is too little, making the coagulation difficult, orthe produced gel becomes too soft that it hardly deposits on the tireinner wall surface. In case of that more than 3 weight %, the quantityof polymer coagulating agent being excessive, in some cases, the repairagent for punctured tire is inhibited to coagulate, and further, it toomuch, aqueous dispersion of polymer coagulating agent remain as they arein the tire, in some cases.

[0021] When the polymer coagulating agent is added to the repair agentfor punctured tire, intermolecular attraction and electrostaticattraction act among the polymer coagulating agent and rubberparticulates in the repair agent for punctured tire, and the polymercoagulating agent will be absorbed on the surface of the rubberparticulate. Then, the polymer coagulating agent absorbed by the rubberparticulate will also be absorbed by the other rubber particulates, arubber network is formed through the polymer coagulating agent by thechain generation of this absorption, and this will deposit on the tireinner wall surface as a gelled coagulum. At this time, liquid substancessuch as moisture and ethylene glycol included in the repair agent forpunctured tire being also included in the network made of polymercoagulating agent and rubber, it becomes possible to make the liquidsubstance difficult to flow out.

[0022] As mentioned hereinabove, according to the present invention, asa repair agent for a punctured tire comprising a latex is introduced andsealed into the inside of a punctured pneumatic tire with a rim, andthen a polymer coagulating agent that can coagulate the latex isintroduced into the inside thereof to coagulate the repair agent forpunctured tire, the repair agent for punctured tire would not drip downwhen the pneumatic tire is removed from the wheel, allowing not to soilthe surroundings.

What is claimed is:
 1. A method of treating a pneumatic tire, whichcomprises introducing a repair agent for a punctured tire comprising alatex into the inside of a punctured tire with a rim, followed bysealing, and then introducing a polymer coagulating agent into saidinside of the punctured tire to coagulate said repair agent.
 2. A methodof treating a pneumatic tire of claim 1, wherein: said polymercoagulating agent is prepared as aqueous dispersion of 20 to 30 weight%, and the water dissipations are introduced into said inside by theproportion of 0.5 to 3 weight % to said repair agent for the puncturedtire.
 3. A method of treating a pneumatic tire of claim 1 or 2, wherein:said polymer coagulating agent is an imine type polymer coagulatingagent comprising polyethyleneimine.